CVE-2021-39887

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    CVE-2021-39887

    Published: 5 Oct 2021Last Modified: 27 Aug 2026

    Summary:

    Details: A stored Cross-Site Scripting vulnerability in the GitLab Flavored Markdown in GitLab CE/EE version 8.4 and above allowed an attacker to execute arbitrary JavaScript code on the victim's behalf.

    References: https://gitlab.com/gitlab-org/cves/-/blob/master/2021/CVE-2021-39887.json, https://gitlab.com/gitlab-org/gitlab/-/issues/332903, https://hackerone.com/reports/1218174

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: GIT

    Events:

    Introduced- 5b5777b8cf3328d27ef549c31f70993da1d1b267
    Fixed -9cd657e5179e339171d27e4573b8f5711db1d824

    Affected versions

    v14.2.4-ee
    v14.2.3-ee
    v14.2.1-ee
    v14.2.0-ee

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High
    CVE-2021-39887 | CVE-DB